tree 6633e61387a178fa8e16fb6fc9ae8a9f34e2370b
parent 8d672c900895404ef380aca75be10fa82f191f84
author Yamagishi Kazutoshi <ykzts@desire.sh> 1516947136 +0900
committer Andrew Bonventre <andybons@golang.org> 1517264182 +0000

tour: check if file content is set before storing in localStorage

file() returns undefined when there is no file to display, like on
https://tour.golang.org/welcome/2

Change-Id: Ia26719537949c9909947068d790f07e2eee8f9ff
Reviewed-on: https://go-review.googlesource.com/90075
Reviewed-by: Andrew Bonventre <andybons@golang.org>